A horizontal-axis wind turbine has a diameter of 50 m and faces air coming at it at 20 miles per hour. If the density (ρ) of air is estimated as 1.1 kg/m3, determine the mass flow rate of air through the turbine in kg/s. Assume the flow of air is not disturbed by the rotation of the turbine. How would your answer change if the turbine is slightly angled with an yaw angle of 10 degrees (yaw angle is the angle between the turbine axis and the wind direction)? [0: remain same; 1: increase; -1: decrease]